`REST API`_. At least two managers are normally required for high
availability.
-- **Ceph OSDs**: A :term:`Ceph OSD` (object storage daemon,
+- **Ceph OSDs**: An Object Storage Daemon (:term:`Ceph OSD`,
``ceph-osd``) stores data, handles data replication, recovery,
rebalancing, and provides some monitoring information to Ceph
Monitors and Managers by checking other Ceph OSD Daemons for a
Ceph Storage Cluster.
Ceph stores data as objects within logical storage pools. Using the
-:term:`CRUSH` algorithm, Ceph calculates which placement group should
-contain the object, and further calculates which Ceph OSD Daemon
-should store the placement group. The CRUSH algorithm enables the
-Ceph Storage Cluster to scale, rebalance, and recover dynamically.
+:term:`CRUSH` algorithm, Ceph calculates which placement group (PG) should
+contain the object, and which OSD should store the placement group. The
+CRUSH algorithm enables the Ceph Storage Cluster to scale, rebalance, and
+recover dynamically.
.. _REST API: ../../mgr/restful